Constructed of lightweight and durable tear-resistant fabrication, the set is perfect for all of your travel needs. High visibility gray interior lining and tie down straps and interior zippered mesh pocket give you plenty of space for your essentials. 4 Multi-directional silent spinner wheels allow you to quickly maneuver in tight spaces and provide effortless movement. Need a little more room? The expandable feature gives you 25% more packing capacity(Not including the 20 inch ). Plus, multiple front zippered pockets are perfect for travel documents and magazines. It also features an internal retractable push-button handle system, and inline skate wheels for smooth rolling. Dual top and side carry handles and bottom grip makes lifting easy.